999995906797 has 2 divisors, whose sum is σ = 999995906798. Its totient is φ = 999995906796.

The previous prime is 999995906779. The next prime is 999995906807. The reversal of 999995906797 is 797609599999.

Together with previous prime (999995906779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 783483441316 + 216512465481 = 885146^2 + 465309^2 .

It is an emirp because it is prime and its reverse (797609599999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999995906797 - 2³⁹ = 450240092909 is a prime.

It is a super-2 number, since 2×999995906797² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999995906197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499997953398 + 499997953399.

It is an arithmetic number, because the mean of its divisors is an integer number (499997953399).

Almost surely, 2^999995906797 is an apocalyptic number.

It is an amenable number.

999995906797 is a deficient number, since it is larger than the sum of its proper divisors (1).

999995906797 is an equidigital number, since it uses as much as digits as its factorization.

999995906797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7030964430, while the sum is 88.

The spelling of 999995906797 in words is "nine hundred ninety-nine billion, nine hundred ninety-five million, nine hundred six thousand, seven hundred ninety-seven".